* @throws LlmException if LLM is not available
     */
    public void generateDirectAnswer(final String userMessage, final List<LlmMessage> history, final LlmStreamCallback callback) {
        if (logger.isDebugEnabled()) {
            logger.debug("[LLM] Delegating generateDirectAnswer. llmType={}", getLlmType());
        }
        getAvailableClient().generateDirectAnswer(userMessage, history, callback);
    }

     *
     * @param userMessage the user's message
     * @param history the conversation history
     * @param callback the streaming callback
     */
    void generateDirectAnswer(String userMessage, List<LlmMessage> history, LlmStreamCallback callback);

    /**
     * Gets the maximum characters for assistant message in history.
     *
     * @return the maximum characters
     */

     * This method is currently not called from the streamChatEnhanced() flow,
     * but is provided as an extension point for future DIRECT_ANSWER intent support.
     */
    @Override
    public void generateDirectAnswer(final String userMessage, final List<LlmMessage> history, final LlmStreamCallback callback) {
        final LlmChatRequest request = new LlmChatRequest();

        final String resolvedPrompt =